<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <title>Title</title>
    <meta name="viewport"
          content="width=device-width, user-scalable=no, initial-scale=1.0, maximum-scale=1.0, minimum-scale=1.0">
    <link rel="stylesheet" href="../css/aui.css">
    <style>
        .table{
            display: table;
        }
        .w1{
            width: 1%;
            display: table-cell;
            white-space:nowrap;
        }
        input{
            width: 100%;
        }
    </style>
</head>
<body>
<div class="table">
    <span class="w1 aui-padded-r-10">左边的长度</span>
    <input type="text" placeholder="输入你的">
    <span class="w1 aui-padded-l-10">右边的</span>
</div>
</body>
</html>